Horrible service from planet fitness

I have had a bad experience with planet fitness call-center agent who goes by the name Rowman and Virginia Ndlovu who had the nerve of closing my query without a solution. I wanted to cancel my contract with them, I haven't used their service since the beginning of covid, my contract was supposed to have ended at the beginning of January but then was later extended to May, 5th of February 2020 I made a query to cancel the contract I was told to pay 25% of the remaining months I have a proof of how the calculations were broken down to the 25%, I am left with 3 months for the contract to end, I want to cancel it now as it serves me no purpose to still have it. I am told that I have to pay the 3 months that I left since I am liable for them. How is it fair for planet fitness to rob me the money I don't even have, why is it now they are telling me a different amount compared to what they have given me before, what has changed now? I want then to use the same calculations for membership cancelation as before.